Blank furnace and burner



(No Model.)

H. E. AUMAN.

BLANK PURNAOE'AND BURNER.

No. 573,126. "Patented Dec. 15,1896.

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Mww I l fvg/7WD Attorney;

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UNITED STATES lPATENT OFFICE.

HARVEY E. AUMAN, OF READING, PENNSYLVANIA.

BLANK FURNACE AND BURNER.

SPECIFICA'LION forming part of Letters Patent No. 573,126, dated December 15, 1896.

Application tiled July 24, 1896.

To all whom it may concern;

Be it known that I, HARVEY E. AUMAN, a citizen of the United States, residing at Reading, county of Berks, State of Pennsylvania, have invented certain Im provem ents in Blank Furnaces and Burners7 of which the following is a specification.

My invention relates to hydrocarbon-furnaces; and it consists in certain improvements in details and also in the general construction and arrangement of the furnace, which are fully described in connection with the accompanying drawings and specifically set forth in the claims.

Figure l is a front elevation, partly in longitudinal section, of my improved furnace with burner attachment. Fig. 2 is an end elevation of the same, partly in cross-section. Fig. 3 is an enlarged sectional View of the burner, and Fig. 4 is a separate viewof the spraying-tip for same. Fig. 5 shows the chill in partial elevation and in cross-section.

The fire-box I is formed by means of front and rear plates AA and end plates B B,wh ich are preferably clamped together by means of lugsh b, and a bottom plate C, supported upon legs D D, the interior being lined throughout with fire-brick. These latter form a layer E:Z upon the bottom plate C and also a lining E3 for the end plates B B, extending to the top of the furnace. The front and rear plates A A are lined with a layer of brick E, upon the top surface of which are supported similar cast-iron chills l-I H, upon which the blanks to be heated are placed, ribs h2 being provided thereon, as usual, to properly space the blanks. These chills in the front and rear walls of the furnaces are placed at somewhat different heights, so that blanks may be inserted into the tire-box in opposite directions and extend past each other without coming in contact. As shown in the drawings, two of these chills are employed in each wall, so as to enable two series of blanks to be heated simultaneously both at front and rear. These are located one above the other, and each top chill ll is formed with a dovetail rib h on the bottom face, by means of whicha layer of tire-brick e is suspended therefrom, the lower face of which forms the top of the lower feedopening or blank-hole '0. Similar dovetail ribs h h are also provided on the inner faces Serial No. 600.438. (No model.)

of the chills for the purpose of positively attachin g thereto inner layers c' E' of fire-brick, which prevent contact of the tire with the chill. The top blank-holes o' o are covered by two series of nre-brick F, which are united by iron bars f f, dovetailed therein, and which' `are inclined toward each other, so as to form `a contracted top opening for the final escape of the products of combustion, this outlet being further reduced, as desired, by suitablyplaced cover-bricks f. 4Kater or other cooling medium is constantly circulated through the whole series of chills by means of piping J, connected to the ends thereof.

The front plate Aof the lire-box has formed integral therewith an air-chamber K, which forms the body of a hydrocarbon-burner. The inner portion 7c of this body extends through the fire-brick lining of the furnace, while the projecting outer portion is provided with a side air-inlet 7.11', to which a blast-pipe may be attached, and with a perforated head or outer end through which the oil is introduced. An adjustable plug P, having a squared end p, screws into this head and is itself interiorly screw-threaded to receive the burnerpipe M, which projects therefrom centrally through the air-chamber K to near the inner extremity of the same. A separate piece of pipe p', which forms a nipple for the connection of the oil-supply pipe, also screws into the plug P from the exterior;

The inner end of the pipe M is screwthreaded for the attachment of a sprayingtip NA This is merely a cylindrical cap which loosely enters the air-chamber K and is interiorly screw-threaded to iit the pipe and provided with axial ribs n on its outer surface. The pipe M is provided with openings 1n near the inner face of the spraying-tip, through which the oil fed into the pipe finds its only outlet into the chamber K between the spraying-tip and the blast-inlet la'. The ribbed tip then forms an obstruction in the annular'outlet from the chamber K into the fire-box, through which the escaping oil is forced by the air-blast with which it is thus thoroughly blended before ignition at the mouth of the burner. The iiame thus produced is spread throughout the fire-box and is effective in heating blanks introduced at one or all of the holes o o o' 0 before escaping at the contracted ICO top of the furnace. There is no possibility of oil escaping from the air-chamber K, and the chills H H' are thoroughly protected, so as to last indefinitely. The fire-box may be thoroughly cleaned, when required, by opening the end holes t'.

l. A blank-furnace, comprising a rectangular fire-chamber, a burner entering the same, chills supported upon bricks, the inner faces of said chills being formed with ribs, bricks having grooves receiving said ribs, a second series of chills, situated above the other chills and having ribs on both their inner and lower faces, bricks supported by said ribs on the inner and lower faces of the latter chills, the bricks pendent from the upper chills and the top surfaces of the lower chills being relatively located to provide open spaces between them, and the walls of the chamber being formed with inlets to said spaces, and inlets to the spaces above the upper chills.

2. A blank-furnace, comprising end plates B, B, front and rear plates A A clamped to said end plates, a bottom plate, a re-brick lining for said end and bottom plates, brick layers for the front and rear plates, chills supported on said layers and having ribs on their inner faces, bricks having grooves receiving said ribs, a second series of chills, situated above the other chills and formed with ribs on both their inner and lower surfaces, bricks supported by said ribs, the bricks pendent from the upper chills being located relatively to the lower chills to provide open spaces between them, fire-bricks forming the top of the chamber and inclined toward each other to form a contracted top opening, the bottoms of the latter bricks being located relatively to the tops of the upper chills to provide open spaces above the latter, cover-bricks for reducing the size of the contracted top opening, inlets to the spaces above the chills, and a burner entering the chamber, substantially as described.

3. A blank-furnace, comprising end Aand front and rear plates, one of said plates being formed integral with a tube extending in ward vinto the fire-chamber and outward beyond said plate, said tube forming the body of a hydrocarbon-burner and being formed with a lateral inlet at a point outside the wall of the fire-chamber, a burner-pipe extending through said tube and havin g spraying means, fire-bricks forming linings for the inner walls of the furnace, said bricks being arranged around the inner projecting end of said tube, and chills supported at different points and lined on their inner surfaces by said bricks, said bricks being arranged to provide open spaces above the chills and said Walls being formed to provide inlets to said spaces.

In testimony whereof I affix my signature in presence of two witnesses.

HARVEY E. AUMAN.

Vi-tnesses:

W. G. STEWART, F. PIERCE HUMMEL. 

